| For estgap i s one oft ypi caldi st ur bances i n f or estecosyst em,and changes f or esthabi t at s i n mi cr ocos m.I n
cur r entst udy,we car r i ed outa f i el d obser vat i on i nvol ved f or estt r ee-f al lgap i n ol d-gr owt h t emper at ur e f or estby t aki ng soi l
sampl es,and mont hl y dynami cs ofsoi lact i ve car bon and ni t r ogen pool s i n f or estgap and undercanopy wer e i nvest i gat ed
dur i ng gr owt h season.The r esul t si ndi cat e t hatsoi lmoi st ur e and bul k dest i ny ar e si gni f i cant l y hi gheri n f or estgap t han t hat
i n undercanopy.Al t hough soi ldi ssol ved or gani c car bon ( DOC)and soi lammoni um ar e hi gheri n undercanopy t han t hose
i n f or estgap,soi lni t r at e i s hi gher i n f or estgap t han t hati n under canopy.Soi l mi cr obi al bi omass C ( SM BC)has no
si gni f i cantdi f f er ence bet ween f or estgap and undercanopy,butSoi lmi cr obi albi omassN ( SM BN)i ssi gni f i cant l y hi gheri n
under canopy t han t hat i n f or est gap. Based on cor r el at i on anal ysi s, soi l mi cr obi al C and N pool s have si gni f i cant
cor r el at i on wi t h s oi lmoi st ur e and bul k dest i ny.Among soi lact i ve C and N pool s,soi lDOC i s t he maj orr el at ed f act orof
SM BC and SM BN i n f or estgap,butsoi lni t r at e exer tundercanopy.M or eover ,t he ef f ect s ofgap di st ur bance on act i ve C
and N pool soff or estt opsoi lwer e anal yzed compr ehensi vel y,and t he mai nt enance mechani smsofsoi lact i ve C and N pool s
i n f or estgap wer e di scussed. |
